Padlock



Patented Dec. 30, 1919.

A. W. DOWE.

PADLOCK.

APPLICATION FI'LED 1Ar1.27.19|9.

V f 56 y Z UMTED strArs iienrmvr OFFICE.

ARTHUR. W. Down, or SAN FRANCISCO, cALiFoaNIA.

l rADLock.

'spcication of Lettersratent.

'Pateateapnee 3o, i919.

Application filed January 27, 1919. Serial No. 273,501.

lterm the vkey'lhole-covergfit'is necessary to push. thefrshackle v"back into. theilock in order :to openji thekey lh ole.fl'Anyv person-.unaciLquaintedf with; -thi foperationr" 'off the lock would notfknow/how toinsertthe key. Af-

Jthe' keyha's'ibeen insertedto operate the Itumblers', it'fmust-'be withdrawn before the Ylockcan be opened',before -the shackle can 'be pulled lvoutfrom lthe lock. f l *This is another feature ofl operation which would ordinarily be unknown tothoseunfamiliar with the lockfWhen" the shackle is pressed into the lock in order to insert the key, the stump is pressed away from the.' tumblers, -'so that there is nothing in contact'withthe tumblers which would serve as a guide or feeler by which :the tumblers could be picked. If the stump is let back into contact with the tumblers, the key hole is automatically closed.

I explain my preferred form of construction in the following specification, the same bein shown in the accompanying drawings,- in willich:

Figure l is a longitudinal section of my improved form of lock.

Fig. 2 is a cross -section taken as indicated by line 2 2 of Fig. 1.

Fig. 3 is a cross section taken as indicated by line 3 3 of Fig. 1 showing the key in p ace.

Fig. 4 is a horizontal section taken as indicated by line 4 4 of Fig. 1.

Fig. 5 shows the various tumblers and tumbler spacing washers.

I may house my lock within any suitable casing, such as an ordinary padlock case 10. This casing may preferably be made in two halves and held together by suitable rivets 11. The shackle 12 is of ordinary construction projecting through openings 13 and 14 in the case and having on one side a shank .vertically :with the shackle. spring 18 pressestheshackle-and stump car- `nier upwardly. f f

-15 of reduced diameteraround which'ithe curved portionnl of stump carrier 17 is .adapted tolit. The stump carrier 17 rests against the frontA Wall-of lthe case and its curved portion fits into the reduced. part of the shackle, so that the stump 'carrier moves A suitable Normally :the 1 stump 20 is pushed upwardlyagainst the peripheries of the tumblers 21 into the position shovvnV in Figs. 1 and 2. There is arsmall lug-22 on the lower end of the stump 20, which 1u engages cam slot 23 in key hole cov'er'24. w ey hole cover .24'h`as a keyslot'25 which'isf-iiormally outlof register with ke'yl hole 526 :in theflgas'eeIO.

' When the parts are in the position shown in Fig. -1v the key27'caif1not` abe inserted. 71 4By moving the shackle 12 into tthe casa-,against the* pressure :ofws'pring 218,- the lug 22 willA -travel downwardly-Hin. the cam slot 23 and willcause the keyhole covertomove to the right 1n F1g.;1and cause the 'key slot -25 to register with-the vkey hole 26. When the parts are in -thisposition, thel key 27.:may

be inserted. .and .pressed upwardly, against the tumbler lugs 29,` to `move1 the,.- tumblers sin; the direction: indicated fby+the tarrow.

Each `of the tumblersfhasra stump slot 30,

and these slots 30 are arranged at different angles to the lugs 29. The key 27 has an end conguration which will press the lugs 29 to the correct position to throw all the slots 30 into vertical positions directly above the stump 20. With the tumblers in position for unlocking, the stump carrier will not move upwardly until the key is removed, for the reason that the key prevents the key hole cover from assuming its position shown in Fig. 1; and the stump 20 cannot move upwardly without the key hole cover moving laterally. As soon as the key is removed the spring 18 presses the stump carrier and stump and shackle upwardly, causlng the stump to enter the tumbler slots 30 and raising the free end of the shackle out of the case. To lock the mechanism, it is only necessary to press the shackle into the case. An overhan 31 on the upper edge of the stump carrier 1 presses downwardly on the lugs 29 to press the tumblers into the positions shown in Fig. 1. The shackle and stump carrier may be pressed into the caso the distance required for such travel of the tumblers 31. When the shackle is pressed into the case in order to msert thekey, the member 3'1 is only pressed down a short dstance, not far enewga its lrrigiboby a sutaole stationary Washer 32, each of the Washers :havintgr a xslot 133 therein for the passage of the stump 20. AThe.Washers .32 have squared upper shoulders 34 which dit .against fthe upper edge of .the lcase to xprevent metaion olf the Washers. ,In :this 'man-11er the vrota-tiem .of the Ione tumbler lis @re-,vented trom causingA rotaten of :any 'of 'the (others. 'The tumblers and are alll mounted on ra md -35 and .weiheldsuciently tghtly te lirictonally remain in any set position. However,-Y .i prpvdeor 'the possibility of 4(the 2o ftumblers xlfoose by Weighting each of-the lug '.36 iso that the .tumblers :are agravitatomaflly balanced. A' 'allese slugs 36 also )serve thegpurposre (olf steps dmt-rthe .tumblens mmwements im fthe diufection'apxoate-'to that iudeated-ln Eig. 3l., the-lugsf :with 'one orf the 'fosse flmvimf? ,j .Hawngaieserlbedfa @referrall ofn'ryl Mentxiom dbnmzzf i. A. a .1. :nevice if ghefqlaa'racterdescrbed, 'm ok llzseymfmdvahlevjlmxrkletherein, .a stump movable .with tlzle` shackle, iwmbllers :with :said stump, key hole the fosse, and meinsrfcoperfatfng with the stumpxoyuovm' saidfkeyholewhenthe stump iswengagement with @the tmeblers,y w 12; n-awd'evln auf the elmxacter'deserbed, .alluck casey-'i1 ehmlle'nnovable ltherein, a canile: movabiy nnecterd with the to eterfere with fthe' operation of the tumbler lugs 29 by ,the

Y'and fto 'uncover :the key hole whex the Stump shalile, a stump tlieen, tmblers' cop- 4s erat'ng wlth said stump, and means copaccess of a key to said tumblers when the ke`A 27. 'stlmp is in engagement with the tumblers.

ach of the tumblers 21 .is separated from 3. In a device of the characterdescrbed, a "l'ock a shackle movable thefe-lgea-''mp cara-ier movable with the shackle, a stump thereon, tumblers coperating with said stump, there bein-g e keyhole n.,rtlease foppeste the timblers, akey hele cover, 1and means coperatngg 'with said cover 'and enum@ carrier whereby said @over 0bstnucts the key ep'enng when the :stump -is n-engagement with the tumblers. A

4. In a device 'of lthe character describe/d, a lock ease, n shackle removable therein, sprang means .'or'gpressing the shackle out roi .fthe easefa stump Acarrier movable with f tl1e:-shwckle, a stmp lblsxereom tumbler?, cooperating with said stump, the stumpp being messed .into engagementwith the tumblers ,by [the gsp'rngyoperaton/oyfsad shackle, fthene bemgm- -hclerinbhecaseppte the tumblers, fai eyaholeeover-,thee m cam l'slt yinthe .hole fdofveryayaa-mdug Ycarried enfgthe as'tump -.lenga.ging cam slot, we Operation oe-saiduugzmd sitimg te tlmew hule cover lover Y1tlie fky y hele when the-"wstump fthe ,tumblens v Geo-NJ. BLAGK, C. fD. fOCosNNon. 

